DSS Racing FX Series Forged Piston Set

Fits Most Chrysler / Dodge / Jeep / Ram 5.7L Hemi Models

1-6703-3917 / 2-6703-3917 / 3-6703-3917 / K1-6703-3917 / K2-6703-3917 / K3-6703-3917

Overview:

The DSS Racing 5.7 Stroker Small Block Mopar Hemi Gen III FX Series Forged Piston Set is engineered for enthusiasts and professional builders seeking durable, high-performance pistons for their 5.7L Hemi engines. Designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi models, this piston set is ideal for stroker builds and engine upgrades that demand strength, reliability, and precision. Whether you're building a street performance engine or a race-ready powerplant, these forged pistons provide the foundation for enhanced combustion and improved engine longevity.

With a compact dish design and optimized compression ratios, these pistons help maximize power output while maintaining efficient combustion characteristics. The set is tailored to accommodate a 4.050" stroke and 6.125" rod length, making it a perfect match for stroker configurations based on the Gen III Hemi platform.

Key Features:

These forged pistons incorporate advanced design elements and manufacturing techniques to deliver superior performance and durability:

• Forged construction for enhanced strength and resistance to high stress and heat
• Comp height of 1.09" for precise deck clearance and optimal piston-to-head clearance
• 12cc dish top design to control compression and reduce detonation risk
• .927" wrist pin diameter with options for full-floating or press-fit installation
• Ring groove dimensions of 1.2mm / 1.2mm / 3mm to accommodate high-performance piston rings
• Compatible with a 4.050" stroke crankshaft and 6.125" connecting rods
• Available in multiple combustion chamber volume options (65cc, 74cc, 85cc) to tailor compression ratios from approximately 8.62:1 to 10.41:1
• Precision machining ensures consistent fitment and reliable sealing

Construction & Design:

Each piston in the DSS Racing FX Series set is crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight properties and mechanical strength. The forging process enhances the grain structure of the metal, resulting in pistons that withstand the rigors of high-performance and forced induction applications without compromising durability.

The pistons feature a carefully engineered dish top design with a -12cc volume to optimize combustion chamber shape and reduce the likelihood of knock under high cylinder pressures. The wrist pins are sized at .927" and can be installed as full-floating or press-fit, depending on engine builder preference and application requirements. Ring grooves are precision cut to fit performance ring sets, ensuring effective sealing and oil control.

Installation & Fitment:

This piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 5.7L Hemi engines, specifically those based on the Gen III Small Block Mopar Hemi platform. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin retention methods based on the chosen pin style.

Due to the stroker configuration compatibility (4.050" stroke and 6.125" rods), builders should verify clearances and component compatibility within their specific engine build. These pistons are ideal for custom stroker builds and performance upgrades where factory pistons are insufficient for the increased cylinder pressures and stroke length.

What's Included:

• Set of forged pistons (quantity as required for engine build)
• Wrist pins sized at .927" (full-floating or press-fit options)
• Precision-cut piston ring grooves ready for high-performance rings

Ideal For:

This piston set is perfect for engine builders, performance enthusiasts, and professional shops upgrading or rebuilding 5.7L Hemi engines for increased displacement and power. It suits stroker engine projects, high-performance street builds, and motorsport applications where durability and precise engineering are critical.

DSS Racing — Founded in 1983 originally as Danny’s Speed Shop, DSS Racing has grown from a small Midwest performance engine shop into a respected name in forged engine components for the high-performance and racing markets. Based in St. Charles, Illinois, DSS is best known for its forged pistons and machined engine parts made in the USA that have been used in championship engines and thousands of builds, blending old-school racing roots with precision manufacturing for enthusiasts and racers alike.